Instability in CH3NH3PbI3 perovskite solar cells due to elemental migration and chemical composition changes
| Author | Ahmad, Zubair |
| Author | Najeeb, Mansoor Ani |
| Author | Shakoor, R. A. |
| Author | Alashraf, Abdulla |
| Author | Al-Muhtaseb, Shaheen A. |
| Author | Soliman, Ahmed |
| Author | Nazeeruddin, M. K. |
| Available date | 2020-08-27T12:05:52Z |
| Publication Date | 2017 |
| Publication Name | Scientific Reports |
| Resource | Scopus |
| ISSN | 20452322 |
| Abstract | Organic-inorganic halide perovskites have rapidly grown as favorable materials for photovoltaic applications, but accomplishing long-term stability is still a major research problem. This work demonstrates a new insight on instability and degradation factors in CH3NH3PbI3 perovskite solar cells aging with time in open air. X-ray photoelectron spectroscopy (XPS) has been used to investigate the compositional changes caused by device degradation over the period of 1000 hrs. XPS spectra confirm the migration of metallic ions from the bottom electrode (ITO) as a key factor causing the chemical composition change in the perovskite layer besides the diffusion of oxygen. XPS results are in good agreement with the crystallographic marks. Glow discharge optical emission spectrometry (GD-OES) has also been performed on the samples to correlate the XPS results. Based on the experimental results, fundamental features that account for the instability in the perovskite solar cell is discussed. - 2017 The Author(s). |
| Sponsor | The authors are thankful to the Center for Advanced Materials (CAM), Qatar University for the laboratory support during the experimental work. The authors are also grateful to the Gas Processing Center (GPC), Qatar University for providing the XPS analysis facility. Thanks to HORIBA Scientific – Jocelyne Marciano, Sofia Gaiaschi and Patrick Chapon for the GD measurements and interpretation. This publication was also made possible by NPRP grant # 6-175-2-070 from Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors. |
| Language | en |
| Publisher | Nature Publishing Group |
| Subject | Perovskite Solar Cells Lead Bromide Formamidine |
| Type | Article |
| Issue Number | 1 |
| Volume Number | 7 |
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